Following a report from SamMobile last week sharing some specific specs coming in Samsung’s much rumored Galaxy Gear smartwatch, today GigaOm reports on a few more details from developers with prototypes of the device. On top of confirming a Sept.4 unveiling at Samsung’s events scheduled to take place in Berlin and New York, the report claims Galaxy Gear will include a 2.5 inch OLED display, dual core processor, an accelerometer, speakers, and built-in NFC:

It is said to be around 2.5 inches diagonally (and 3 inches diagonally including the case), is powered by a dual core processor and should have pretty decent battery life. In addition, we are told the watch has a camera that is integrated into the strap and even has tiny speakers in the clasp of the watch, plus built-in NFC to allow for bump-to-sync and authenticate. The watch uses Bluetooth 4.0 LE to connect with smartphones for connectivity… In addition, the watch has a built-in accelerometer that makes it possible to switch it on when it is moved up towards the eye. It could be a great way to wake the watch and also the apps and manage battery power. The watch screen will support the usual touch, swipe and select type gestures but will likely not have text-input.

The report adds that watch will work with a Samsung watch manager app on a smartphone and utilize apps from the Samsung App Store, not Google Play. GigaOm also claims that Galaxy Gear will support Facebook and Twitter integration at launch. The Samsung App Store integration could mean the device will only be available for Samsung device users:

For instance, if one has swiped through notifications, stops at an email blurb and then picks up the smartphone, the phone will display that email message attached to the blurb you were looking at on the watch. The company will feature integration with Twitter and Facebook at launch… That likely means if you want a Samsung Galaxy Gear smartwatch, you’ll need a Samsung Galaxy phone or tablet. Perhaps Samsung is copying too much from Apple of late and is creating a walled-garden approach of its own; something that Android fans aren’t likely going to be keen on.

An earlier report from the often reliable SamMobile claimed the Galaxy Gear smart watch would include a 1.5GHz dual core Samsung Exynos 4212 CPU, ARM Mali-400 MP4 GPU, 1GB RAM, a 2 megapixel camera, and a 320×320 1.67-inch AMOLED display. This morning another report claimed that the device would become available sometime in October, while Bloomberg reports the first generation Galaxy Gear won’t feature a flexible display.

We’ll be on hand in Berlin on Sept.4 to bring you updates live from the Samsung event.